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No commandline option in AVRStudio 4.17
Hi there, Until now I worked with AVRStudio 4.15 and WinAvr 20081205. Now I updates this to AVRStudio 4.17 and WinAvr 20090313. I always use a batchfile to start working on my...
Friday, 18 September 2009 - 07:29
UART on 1Mbit
Hi there, I got the following UART receive interrupt routine running on ATMEGA2560/8MHz/WINAVR20081205 : unsigned char r0_buf[256]; unsigned char r0p=0; ISR (SIG_USART0_RECV...
Monday, 14 September 2009 - 14:53
Motor PWM : Break or open ?
Hi there, I am using PWM to drive a motor via the L293D H-bridge. Enable input is connected to +, for the PWM I switch between (HL) and 'break' (LL) and have good experiences with...
Wednesday, 5 August 2009 - 14:53
Temperature calibration
Hi there, I want to calibrate my temperature sensor with indicator in an external laboratory. The range of my system is 0 to 70 °C. How can I determin how much and which...
Wednesday, 13 May 2009 - 14:14
Atomic code to prevent interrupt
Hi there, I would like to have a piece of atomic code, meaning no ISR can occur in a block of code. For example something like this : ATOMIC_BEGIN instruction; instruction2;...
Thursday, 9 April 2009 - 09:16
Port declaration : where to put
Hi there, I would like to know where to put the port declarations such as DDR initialisations etc. For example I have a uart, spi and gpio port. Option (a) Put uart declarations...
Friday, 24 October 2008 - 13:55
Auto-select RS232 or FTDI ?
Hi there, For a new product I want an easy option to use as well as RS-232 (via MAX232 or similar) and FT232R connected to the same port of the uP. Can someone suggest a simple...
Thursday, 16 October 2008 - 14:59
RGB Color sensor
Hi there, For an optical wavelength sensor I need small RGB sensors. A perfect solution would be the Avago ADJD-311 but unfortunately Avago decided to take this sensor out of...
Wednesday, 1 October 2008 - 13:43
RTC capacitors 32k768
Hi, I am using the ATMEGA32 with 3M68 main resonator and want to use a 32k768 xtal for clocking purpose. Tolerance of the low-freq not important. What range of capacitors should I...
Wednesday, 14 March 2007 - 17:11
Butterfly skip bootloader
What is the best way to use a butterfly as final product ? Problem I have is that the joystick must always be poititioned in UP to start the processor. One way is to short-cut the...
Wednesday, 24 January 2007 - 13:21
Fastest possible PORTB=PORTB^0x08
Hello, I need a timer0 interrupt routines which basicly does only the following : SIGNAL (SIG_OUTPUT_COMPARE0) { PORTB=PORTB^0x08; // Toggle I/O bit } But I need it to be...
Tuesday, 16 May 2006 - 12:19
enum : Why does this not give a warning ?
When I type the following code : enum {black, blue, red, green} color; enum {monday, tuesday, wednesday} day; color=black; day=monday; color=tuesday; It should give an...
Friday, 9 September 2005 - 09:33

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